Delta Modulon DPH series - Bypass Mode_ Dual Input_ Single Unit

3-20
Modulon DPH Series
MAIN LOAD
BYPA.
Q1 Q4
Q3
UPS
Q0Q2
Q5
Rectifier Inverter
Static Switch
Delta or non-Delta External Maintenance Bypass Cabinet
Batteries
(Figure 3-19: Battery Mode Diagram_ Dual Input Single Unit)
3.2.3 Bypass Mode_ Dual Input_ Single Unit
When the inverter encounters abnormal situations such as over temperature, overload, short
circuit, abnormal output voltage or low battery, it will automatically shut itself down. If the UPS
detects the bypass AC source is normal, it will automatically switch to bypass mode to protect
the connected critical loads from power interruption. Please refer to Figure 3-20. After the
above-mentioned abnormalities are eliminated, the UPS will switch back to online mode from
bypass mode. During bypass mode, the UPS’s tri-color LED illuminates yellow and the text
‘Bypass’ appears in the upper right corner of the screen.
MAIN LOAD
BYPA.
Q1 Q4
Q3
UPS
Q0Q2
Q5
Rectifier Inverter
Static Switch
Delta or non-Delta External Maintenance Bypass Cabinet
Batteries
(Figure 3-20: Bypass Mode Diagram_ Dual Input Single Unit)